due to a potential difference usually bigger than
50V, that can produce a tingling as well as
sensation, muscle contraction, pain, respiratory
arrest, burning and destruction of tissue, etc.
How to avoid macro shock
The high potential on the metal surface
(100V in figure 10) induce an electric current to
Fig 10
ground (0V) throughout the patient provoking a
macro shock to the patient, but if the equipment
is grounded (figure 11), the electric current goes
to ground throughout the a low resistance
ground conductor because it has almost no
opposition to the electric current flowing, the
human body has an average from thousands
ohms to even a million of ohms, that´s why the
human body offer to much opposition to the
electric current than the ground conductor, so Fig 11
the current diverts to the ground system
throughout the low resistance ground conductor,
as the 1.5V disappears from the battery when a
conductor is connected between its positive and
negative terminals, the high potential on the
me